sen‧sor /ˈsensə $ -ər/ noun [countable]
[Word Family: adjective: sensible, insensible, senseless, sensitive ≠ insensitive, sensory, nonsensical, insensate; noun: sense ≠ nonsense, sensibility ≠ insensibility, sensitivity ≠ insensitivity, senselessness, sensitization, sensor; adverb: sensibly, senselessly, sensitively ≠ insensitively; verb: sense, sensitize]
[Date: 1900-2000; Language: Latin; Origin: sensus, past participle of sentire; ⇒ sense¹]
a piece of equipment used for discovering the presence of light, heat, movement etc

[TahlilGaran] Dictionary of Contemporary English ▲